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Copper (II)-catalyzed selective CH bond activation has been extensively investigated, but few examples are optically visible and reversible. We herein report a visible switching of copper (II)-catalyzed CH bond formation/cleavage regulated by the association/disassociation between copper (II) and calix[3]dimethoxycarbazole (2). Upon binding to copper (II), the CH bond of the bridging methylene of...
The binding ability of calix[3]carbazole (1) to metal ions has been investigated. It is found that 1 could serve as a non crown ether based, C3-symmetrical receptor for Ba2+ via the marriage of cation–π and cation–dipole interactions. FID assay further illustrates that 1 could selectively interact with Ba2+ over Pd2+. A possible binding mechanism for [1-Ba2+] complex is proposed.
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